Fix lint errors for database, firestore, https tests

spec/fixtures/mockrequest.ts

@@ -0,0 +1,82 @@
+import * as jwt from 'jsonwebtoken';
+import * as _ from 'lodash';
+import * as nock from 'nock';
+import * as mocks from '../fixtures/credential/key.json';
+
+// MockRequest mocks an https.Request.
+export class MockRequest {
+  public method: 'POST' | 'GET' | 'OPTIONS' = 'POST';
+
+  constructor(
+    readonly body: any,
+    readonly headers: { [name: string]: string }
+  ) {
+    // This block intentionally left blank.
+  }
+
+  public header(name: string): string {
+    return this.headers[name.toLowerCase()];
+  }
+}
+
+// Creates a mock request with the given data and content-type.
+export function mockRequest(
+  data: any,
+  contentType: string = 'application/json',
+  context: {
+    authorization?: string;
+    instanceIdToken?: string;
+  } = {}
+) {
+  const body: any = {};
+  if (!_.isUndefined(data)) {
+    body.data = data;
+  }
+
+  const headers = {
+    'content-type': contentType,
+    authorization: context.authorization,
+    'firebase-instance-id-token': context.instanceIdToken,
+    origin: 'example.com',
+  };
+
+  return new MockRequest(body, headers);
+}
+
+export const expectedResponseHeaders = {
+  'Access-Control-Allow-Origin': 'example.com',
+  Vary: 'Origin',
+};
+
+/**
+ * Mocks out the http request used by the firebase-admin SDK to get the key for
+ * verifying an id token.
+ */
+export function mockFetchPublicKeys(): nock.Scope {
+  const mockedResponse = { [mocks.key_id]: mocks.public_key };
+  const headers = {
+    'cache-control': 'public, max-age=1, must-revalidate, no-transform',
+  };
+
+  return nock('https://www.googleapis.com:443')
+    .get('/robot/v1/metadata/x509/securetoken@system.gserviceaccount.com')
+    .reply(200, mockedResponse, headers);
+}
+
+/**
+ * Generates a mocked Firebase ID token.
+ */
+export function generateIdToken(projectId: string): string {
+  const claims = {};
+  const options = {
+    audience: projectId,
+    expiresIn: 60 * 60, // 1 hour in seconds
+    issuer: 'https://securetoken.google.com/' + projectId,
+    subject: mocks.user_id,
+    algorithm: 'RS256',
+    header: {
+      kid: mocks.key_id,
+    },
+  };
+  return jwt.sign(claims, mocks.private_key, options);
+}